/*
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/* $Id: time_misc.c 3 2007-07-10 06:59:05Z kf701.ye $ */

#include "factory.h"

#include <time.h>

/**
 * @brief get time since system last up
 * @return seconds or -1 on error
 */
time_t get_uptime(void)
{
	FILE *fp = fopen("/proc/uptime" , "r");
	if( !fp )
	{
		sys_message("%s: fopen %m\n",__func__);
		return -1;
	}

	char buf[128];
	if( 0 == fgets(buf, sizeof(buf) , fp) )
	{
		sys_message("%s: fgets failed\n",__func__);
		fclose(fp);
		return -1;
	}

	if( 1 != sscanf(buf," %s.", buf) )
	{
		sys_message("%s: sscanf failed\n",__func__);
		fclose(fp);
		return -1;
	}

	fclose(fp);
	return (time_t)atoi(buf);
}

